Improvement in scaffoldings



. UNITED STATES PETER EoDEcKEE,

PATENT OFFICE.

OF SIDNEY, OHIO.

IMPROVEMENT IN SCAFFOLDINGS.

Specication forming part'of Letters Patent No. 156,594, dated November3, 1874; application filed october s, i874.

To all whom it may concern:

Beit known that I, P. RODEGKER, of Sidney, in the county of Shelby andState of Ohio, have invented certain new and useful Improvements inExtension-Scaffolding; and I do hereby declare that the following is afull, clear, and exact description thereof, reference being had to theaccompanyingdrawings, and to the letters of reference marked thereon,which form part of this specification.

The nature of my invention consists in the construction and arrangementof an extensionsupport for scaffolding, as will be hereinafter morefully set forth. i

In order to enable others skilled in the art to which my inventionappertains to make and use the saine, I Will noW proceed to describe itsconstruction and operation, referringto the annexed drawing, in which-Figure 1 is a side elevation of my extensionsupport with bracket. Fig. 2is a front view of the same; Figs. 3 and 4 are cross-sections throughthe lines :lo :c and y y of Fig. l, respectively.

A represents an ordinary L-shaped bracket, provided on top at the anglewith a roller, B; and on the under side, in the angle, is formed asocket, a, as shown in Fig. l. The extensionsupport is formed oftwobars, C and D, the lower bar, C, having at its upper end a band, b,which surrounds the upper bar, D. At the lower end of this upper bar Dis fastened an open band, d, the ends of which are bent inward, andenter longitudinal grooves c e in the sides of the lower bar O. Atasuitable point on the bar C are arms f f, in which the journals ofadrurn, h,have their bearin gs, and on one of the journals is fastened acrank, m, by means of which it is revolved. From the drum h a rope, i,passes upward over a pulley, n, in the upper end of the bar C, and isfastened to the lower end of the'bar D. Upon the journals of the pulleyn is pivoted a bail or latch, p, which surrounds the bar D, and is tocatch in notches w, made in the "outer surface of said bar. s is a wireattached to the bail p to release the same from the bar D. The npper endt of the bar D is rounded to iit in a socket, a, of the bracket.

The operation is as follows The longer arm of the bracket A is placedagainst the side of the building by inserting the knuckle t of the bar Dinto the socket a. To elevate the bracket upon which the scaffoldingrests is done by turning the crank m, whereby the rope c' is Wound up onthe drum 71a'nd the bar D moved upward, elevating the bracket to anydesired height, where it will be securely held by the catch p droppinginto either of the notches .fr on the bar D. The roller B prevents thebracket from being caught on the edges of the weather-boarding or otherobstruction on the side of the building. To lower or depress the extension, apply power to the crank m until the upper bar D is held insuspense, or relieves the catch p,- tlien pull down on the rod or Wires,wl1ich Will remove the latch from thenotch or shoulder x, and thedepression or descent will be regulate by the crank m at pleasure, untilthe latch p drops again into the desired notch, where it will remainsecure, as before. i

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

The combination of the grooved bar O, the bar D,provided with notches a'x, the bands b d, and the pivoted latch p, with trip-rod s, allconstructed and arranged with a Windlass, h m, and rope i, to operatesubstantially as and for the purposes herein setforth.

In testimony that I claim the foregoing as my own I affix my signaturein presence of two Witnesses.

PETER RODEGKER.

Witnesses:

N. R. BUREEss, J. S. UONKLIN.

